body {
  font-family: Arial, sans-serif;
  background-color: #15151D;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  max-height: 800px;
  overflow: hidden;
}
.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px; 
  padding: 20px;
  box-sizing: border-box;
}

.img-container {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
}

.pic_nav {
  flex: 1;
  min-width: 300px; 
}
.pic_nav{
  width: 100%;
  height: 1000px;
  margin-top: 180px;
  max-height: 1000px;
  object-fit: contain;
  position: relative;
  right: 400px;
}
#pic_nav{
  width: 100%;
  height: 1000px;
  margin-top: 180px;
  max-height: 1000px;
  object-fit: contain;
  position: relative;
  right: 900px;
}

.pic_background {
   flex: 1;
  min-width: 300px; 
  display: flex;
  flex-direction: column; 
  justify-content: center;
  align-items: center; 
  font-size:29px ;
  font-family: 'Source Han Serif SC',Medium;
  color: #fff;
}

.pic_background img {
  width: 100%;
  height: auto;
  object-fit: contain;
}
#logo{
  z-index: 5;
  position: relative;
  bottom: 875px;
  right: 285px;
}
.nav-homePage{
  display: flex;
  justify-content: center;
  align-items: center;
  width: 220px;
  height: 50px;
  border-radius: 20px;
  z-index: 5;
  position: absolute;
  top: 180px; 
  left: 52%;
  transform: translateX(-100%);
  background-color: #007dfe; 
  color: #fff;
}
.success{
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 50px;
  border-radius: 20px;
  z-index: 5;
  position: absolute;
  top: 270px; 
  left: 50%;
  transform: translateX(-100%);
  color: #fff;
}
.aboutUs{
  display: flex;
  justify-content: center;
  align-items: center;
  width: 200px;
  height: 50px;
  border-radius: 20px;
  z-index: 5;
  position: absolute;
  top: 360px; 
  left: 50%;
  transform: translateX(-100%);
  color: #fff;
}
#icon-homePage,#icon_jiuye,#icon_women{
  margin-right: 20px;
}
#down1{
  margin-left: 100px;
}
#down{
  margin-left: 70px;
}
.sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background-color: #1d1e24;
  z-index: 5;
  width: 220px; 
  transition: all 0.3s ease;
}

.success,
.aboutUs {
  transition: top 0.3s ease; 
}
.sub-menu div {
  padding: 10px; 
  cursor: pointer; 
}
.sub-menu div:hover {
  background-color: #454449; 
}
.separator1{
  width: 240px;
  height: 1px;
  background-color: #37383d; 
  position: absolute;
  top: 250px; 
  left: 53%;
  transform: translateX(-100%);
  z-index: 5;
}
.separator2{
  width: 240px;
  height: 1px;
  background-color: #37383d; 
  position: absolute;
  top: 340px; 
  left: 53%;
  transform: translateX(-100%);
  z-index: 5;
}
#logout{
  width: 200px;
  background-color: #37383d; 
  position: absolute;
  top: 850px; 
  left: 50%;
  transform: translateX(-100%);
  background-color: transparent;
  border:none;
  z-index: 5;
}